A multi-element stable isotope approach coupled with chemometrics for the determination of Tieguanyin tea geographical origin and harvest season

Zhou, Peng; Li, Zeyu; Ouyang, Li-Qun; Gong, Xuedong; Meng, Ping; Dai, Ming; Wang, Zheng; Wang, Ying

doi:10.1039/c8ay02191k

Cited by 35 publications

(14 citation statements)

References 37 publications

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“…Other factors including the absorbability of the plant, chemical state of the soil, climate, microorganism activity, pesticide use, pollution, water, cultivation practices, and processing methods can also cause elemental concentration differences. These differences have been determined using various analytical techniques such as wavelength dispersive X‐ray fluorescence (WDXRF), inductively coupled plasma–mass spectrometry (ICP‐MS), isotope ratio–mass spectrometry (IRMS), and laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) and have been used for geographical origin determination . More recent work includes the origin determination of cocaine, marijuana, and synthetic cannabinoids using elemental content measured by ICP‐MS .…”

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confidence: 99%

Differentiation of Commercially Available Kratom by Purported Country of Origin using Inductively Coupled Plasma–Mass Spectrometry,

Braley

Hondrogiannis

2019

Journal of Forensic Sciences

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Kratom is a plant material exhibiting both analgesic and stimulant effects and is also forensically relevant since it is abused as a “legal high.” It is regulated in several countries but not scheduled in the United States at the federal level. This study used inductively coupled plasma–mass spectrometry (ICP–MS) to measure the concentrations of 13 elements in 19 kratom samples obtained from an online distributor selling kratom, from Borneo, Malaysia, Indonesia, Thailand, and Vietnam, for the purpose of using the elements to discriminate among purported country of origin, “suborigin,” and strain. Analysis of variance revealed statistical differences in concentrations of elements from each group, while discriminant function analysis (using leave‐one‐out classification) successfully classified kratom samples by their purported country of origin (100%), “suborigin,” (100%), and strain (86%). Our method illustrates the possibility of utilizing ICP–MS for determination of commercially available kratom samples by purported origin, “subororign,” or by product line.

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mentioning

confidence: 99%

Differentiation of Commercially Available Kratom by Purported Country of Origin using Inductively Coupled Plasma–Mass Spectrometry,

Braley

Hondrogiannis

2019

Journal of Forensic Sciences

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“…Other factors include the absorbability of the plant, chemical state of the soil, climate, microorganism activity, pesticide use, pollution, water, cultivation practices, and processing methods [11]. These elemental differences have been determined using various analytical techniques such as wavelength-dispersive X-ray fluorescence (WDXRF) [12][13][14][15][16][17], inductively coupled-mass spectrometry (ICP-MS) or ICP-optical emission spectrometry (OES) [9,10,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], isotope ratio-mass spectrometry (IRMS) [23,28,29,31,37,38], and laser ablationinductively coupled-mass spectrometry (LA−ICP−MS) [39] and have been used for geographical origin determination [10,13,14,36,[39][40][41][42][43][44][45]…”

Section: Introductionmentioning

confidence: 99%

“…These elemental differences have been determined using various analytical techniques such as wavelength-dispersive X-ray fluorescence (WDXRF) [12][13][14][15][16][17], inductively coupled-mass spectrometry (ICP-MS) or ICP-optical emission spectrometry (OES) [9,10,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], isotope ratio-mass spectrometry (IRMS) [23,28,29,31,37,38], and laser ablationinductively coupled-mass spectrometry (LA−ICP−MS) [39] and have been used for geographical origin determination [10,13,14,36,[39][40][41][42][43][44][45][46][47][48][49]…”

Section: Introductionmentioning

confidence: 99%

Dokha brand differentiation by elemental analysis measured by inductively coupled plasma–mass spectrometry

Thomas

Belunis

Alibozek

et al. 2022

Journal of Forensic Sciences

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Dokha is a tobacco product commonly used in Middle Eastern and Northern African regions. It is available in three blends purportedly corresponding to the degree of "buzz" experienced by the user. The "buzz" has been linked in part to nicotine levels, which are higher than those found in cigarettes and is believed to be the reason dokha is abused as a "legal high." There have been reports of seizure activity from dokha users, and elevated concentrations of toxic metals have been measured in dokha tobacco. The purpose of this work was to determine whether we could use dokha's elemental content, measured by inductively coupled plasma-mass spectrometry, to link dokha back to its brand. This could aid investigators in identifying brands and/or distribution routes in the case of adverse effects resulting from dokha use. We measured the concentrations of Mg, K, Mn, Ni, Cu, Rb, Sr, and Ba in Medwakh, Nirvana, Scorpion, Enjoy, Kingdom, and Iconic dokha brands. Analysis of variance revealed statistical differences in concentrations of elements among groups. Discriminant function analysis (using leave-one-out classification) was 58.3% successful at differentiating brands. Enjoy dokha was the most, and Kingdom dokha the least, correctly classified among groups. Attempts to further link dokha blends back to light, medium, and heavy blends were less successful. These results indicate potential for using elemental content to discriminate among dokha brands. Our data may also help to understand the degree of additional processing and/or adulteration of dokha products available to users in the United States.

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“…Since the isotope ratios of carbon, hydrogen, and oxygen were altitude-, latitude-, and climate-dependent, these three stable isotope ratios can provide information about the geographic origin and metabolism of plants, so the isotopic ratios of carbon, hydrogen, and oxygen are suitable for tracking the geographical origin of agricultural products related to regional climate conditions [17,[21][22][23]. In addition, soluble sugars and organic acids were important nutrients in apples, as well as the main flavor compounds in apples.…”

Section: Introductionmentioning

confidence: 99%

Determining the Geographical Origin of Fuji Apple from China by Multivariate Analysis Based on Soluble Sugars, Organic Acids, and Stable Isotopes

Zhang

Nie

Zhaoguo

et al. 2022

Journal of Food Quality

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The aim of this study was to explore the regional characteristics of soluble sugars, organic acids, and stable isotopes (δ2H, δ18O, and δ13C) in Fuji apple and the viability of tracing the geographical origin. Totally, 181 Fuji apple samples from 2017 and 2018 from three main apple production regions in China, Bohai Bay (BHB), Loess Plateau (LP), and Northwest region (NW) were collected. The parameters of soluble sugars, organic acids, and stable isotopes in samples were analyzed with HPLC, IC, and IRMS, respectively. The results of regional difference analysis, multiway variance analysis, and correlation analysis indicated that sorbitol (Sor), glucose (Glu), fructose (Fru), sucrose (Sucr), δ2H, and δ13C can be used to distinguish the samples from the three regions. Stepwise linear discriminant analysis (SLDA) showed that the correct discriminant rate of samples from the advantageous production areas of apples in China (BHB and LP) was 82.2%, and the most effective indexes were Glu, Fru, Sucr, and δ2H. Moreover, satisfactory classification can be achieved in samples from BHB and NW, with a correct classification rate of 90.0%, and Sor, Glu, and Fru were included in the discrimination model. Furthermore, the validity of the discriminant model was verified by the prediction set. The study also found that organic acids were not suitable to distinguish the apple samples from the three regions. In addition, soluble sugars and stable isotopes could not effectively distinguish LP and NW samples, which was also the reason that the samples from the three main apple production regions could not be distinguished well.

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A multi-element stable isotope approach coupled with chemometrics for the determination of Tieguanyin tea geographical origin and harvest season

Abstract: The taste and aroma quality and the price of tea are largely impacted by the geographical origin and harvest season.

Cited by 35 publications

References 37 publications

Differentiation of Commercially Available Kratom by Purported Country of Origin using Inductively Coupled Plasma–Mass Spectrometry,

Differentiation of Commercially Available Kratom by Purported Country of Origin using Inductively Coupled Plasma–Mass Spectrometry,

Dokha brand differentiation by elemental analysis measured by inductively coupled plasma–mass spectrometry

Determining the Geographical Origin of Fuji Apple from China by Multivariate Analysis Based on Soluble Sugars, Organic Acids, and Stable Isotopes

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